4 ms·
Maybe CK-12 Foundation[0]? Also CK-12 have FlexBook's[1]. [0] https://www.ck12.org/ https://www.ck12.org/ [1] https://en.wikipedia.org/wiki/FlexBook https://en
by pome 8y ago
Maybe CK-12 Foundation[0]? Also CK-12 have FlexBook's[1].
[0] https://www.ck12.org/ https://www.ck12.org/
[1] https://en.wikipedia.org/wiki/FlexBook https://en.wikipedia.org/wiki/FlexBook