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First, understand the kanji meaning with unique stories. Then practice reading and writing. And... 300 kanji can be learned before you realize it!
Learning 300 Kanji through stories by F,; Watanabe, Yoko; Kuramochi, K Beuckmann. Published in 2008 by Kurosio Publs. List contains 16 sections and 1180 words. ISBN: 978-4874244029