Deutsch/English: 300+ wichtige Worte & their translation, as google spread sheet (partial source: pdf)
NB: this google spread sheet imports directly into flashcard apps such as Flashcards Deluxe
Deutsch: Could be useful - official class 1-2 & class 3-4 vocabulary from Berlin schools: link
and also this website with smart lists of difficult words: https://www.gut1.de/
English: the famous Oxford reading tree series as (free) ebooks
NB: you need to create an account with www.oxfordowl.co.uk
Maths stuff:
Singapore Math Kangaroo: http://mathkangaroo.sg/samples/
French: watch Tintin en Amerique, extract (french) subtitles here and finally read it here
French: watch Tintin en Amerique on YouTube (extract french subtitles here)
Basic french vocabulary here: www.eptramelan.org/exercices/Francais/Orthographe/voc_base_2e/Vocabulaire_2e.pdf
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