To study and review grammar (that you might need to refresh, not everything), check these out:

basic czech language principles: here
how to create and answer ANO/NE questions: here
how to create and answer KDO/CO questions: here
how to create and answer ANO/NE questions (with adjectives): here
how to create and answer JAKÝ/JAKÁ/JAKÉ questions (for adjectives): here
how to conjugate verbs: U-type and M-type
how to create past tense: in general and word order and word order of reflexive verbs
how to use months and days
in general, check the whole Flickr account, I am updating it daily, sooner or later I will put here a list with „table of contents“ for easier orientation

Homework