Does anyone have suggestions for workbooks that go over grammar and sentence structure/vocabulary? I think it would be really helpful to have a book that explains things and then has assignment sheets to fill out, etc.
This is a good online school: https://ehungarianschool.com
This is my favorite online english-hungarian dictionary: http://topszotar.hu/angolmagyar
Here are many online hungarian courses and books: http://www.magyarora.com/english/links.html
And a very good application (smartphone): Fun easy learn hungarian (6000 words)
Gyakorló Magyar nyelven - A Practical Hungarian Grammar" Szita Szilvia and Görbe Tamás by Akadémiai Kiadó. This takes you through grammar in Hungarian and English with worked examples and graded exercises (with answers).