Some necessary historical context for Cyprus:
Great Britain designed the Republic of Cyprus as an unitary presidential republic that was inhabited by two peoples: Orthodox Christian Greeks and Sunni Muslim Turks. Non-Orthodox Christians (namely Western Catholics, Maronite/Arab Catholics, Anglicans and Armenian Apostolic Christians) were classified as Orthodox Christian Greeks, and technically so were Jewish people, On the other end, non-Sunni Muslims (which are afaik very few and nearly none of them Turkish) were classified as Sunni Muslim Turks. If you didn't see yourself as neither Greek or Turk or you were irreligious, tough luck, the constitution drafted by Her Majesty's lawyers only recognise those two groups.
Since it was designed to be an unitary state, very few things were devolved to the communities, but among them were education and family law (were provisions from the Orthodox Canon and the Shari'a were included, something that I believe we finally stopped doing before EU admission). So, all public schools in Cyprus were "Greek" and "Turkish", and therefore "Christian" and "Islamic". Turkish Cypriots are of course in their majority strongly Kemalists so they had some degree of secularism that the Greek community still doesn't have. Private schools existed for Catholics and Armenian Apostolic Christians.
To sum up, "Greek schools" were intended to produce Greek Christians. And they did.
They still do. After 1963, when Turkish Cypriots withdrawn from the Republic of Cyprus, the Greek Educational Board became the Ministry of Education and Culture, without changing much. In the recent years they were obliged to provide opt-outs from Christianity classes (thanks EU), but they required parental consent and a proof that they belonged to a different organised religion. Again, irreligious people weren't recognised. "You were baptised therefore you are Christian!" or "On your student file it says Christian Orthodox, you can't opt out". And of course, even if irreligiosity was recognised, your parents needed to consent, and even my non-practising parents are uncomfortable with me and one of my brothers being irreligious and they prefer not to let people know about it. But even for students of other faiths, it was rarely enforced. In many cases people who applied to be exempt never heard back, and those who did should also be lucky to have a tolerant school principal. In a recent case a JW student, although having received an exemption note was nearly expelled from the school of accumulating hundreds of "absent" notes... all for the christianity class that she was supposedly exempt from, but the principal didn't wish to accept it.
Now, context complete, to what is actually taught:
In pre-school I remember the typical stories from the Bible but in children-friendly version. Constant exposure to Orthodox Christian symbols (and Greek nationalistic symbols, plus, militant culture, "Never Forget 1974", drilling of the fear of Turks). Around that time I was required to wear a cross around my neck because apparently "it was shameful not to wear one".
Now, on primary school, Christianity becomes a formal lesson. Lots of hours per week (6~10), and though it varies, it's always more hours per week than Environment and Geography combined.
The religious class also start as light but now they incorporate morality and warnings that we should be careful because there are "misguided people", "schismatics" and "heretics". It's mostly a fear of Jehovah's Witnesses but some other "heresies" were mentioned which I have since forgot.
Nationalism was also amplified up to the eleven, with notebooks that had "NEVER FORGET
" and pictures from northern Cyprus printed on them. There was also a Never Forget subject, usually once a week, where we would learn about the atrocities of Turkey in 1974. More over, it is obligatory to take part in 3 or 4 militaristic parades each year, on "national holidays". Imagine 7 year olds marching like soldiers, with flags and stuff (no guns though, thank God). That was obligatory.
It didn't stop on Christianity Class though. Not only nationalistic and christian imagery and rhetoric was used in all books, from mathematics textbooks to environment studies (where Noah's Arc was used to explain biodiversity), but history textbooks where incredibly biased in favour of the Christian Church. Sure, the Church is part of the histories, but the books where full of lies. Eg the Church is presented as the main force behind the 1821 uprising of Greeks against the Ottoman Empire, when in fact the Christian Church condemned that uprising and excommunicated its leaders because their interests (tax collection and political authority) were protected by the Ottomans.
Outside school, you were expected to go to a katēchiticon (let's call it Bible study in English) on Saturday and to the church on Sunday. Since in primary school more teachers are local, they expect to see you there, and if you didn't show up you would be scolded on Monday in front of the whole class. For that reason I kept going to Bible Study since I was 10 years old. Maybe 11. I was a good student as well, I've won an icon of our Lord and Saviour.
Now, in Middle School the subject of Biology appears, and the subject of Christianity still exists (Which I should mention that it's misleading called Religious Affairs, though it only talks about the Orthodox Christian worldview). In Biology, as usual religious rhetoric and no mention of evolution.
In religious class in middle school we watched a lot of tapes. Stuff about satanic messages if you play tapes in the reverse order, how rock music will make you a drug addicted satanist, how abortion is murder (even though abortion is illegal anyway) and other conspiracy theories about the new world order and stuff.
History also remains skewed in favour of the Church.
Nationalist sentiments and militaristic parades continue. History is never approached critically and what happened between 1960 and 1974 is not discussed.
But now you can feel free not to go to Church every Sunday because the teachers in secondary schools are rarely local.
The two years of highschool are also like middle school. Now, on the final year those two things happened:
a) There was a single page devoted to evolution in the text book. As the biology teacher said "I am obliged to go through this so yeah, it says that humans were monkeys. If you want to believe that, suit yourself. I am no monkey". And then she showed as dramaticised videos of abortions for maybe the 12th time in that year. She really hated abortions. And they are not even legal here.
b) there was a chapter on world religions in the book. in those two lessons we learnt two things: a) muslims are monsters who kill every person they meet and absolutely loathe women and b) every other religion in the word is ridiculous, laughable and idol-worshiping. Those Hindus who worship cows and spirits with a gazillion hands and 5 eyes etc. On Shintoism especially he went on to tell us that Japanese people are all suicide pilots.
So that's pretty much my experience with public education in Cyprus.
Now, I am long out of school but I read the latest Ministry's order: emphasis on religion, organise students to help at local churches, form religious choirs.
Supposedly all in school time.