Sometimes you just need a little review of old concepts. These handouts should help a bit with some autonomous review of (or even introduction to) some of the big, basic structural concepts in German. Also includes a set of science- and technology-focused worksheets that follow a first-year progression.
The Internet is a wide and wild place, and while there are many incredible resources for German, it can help to have a little bit of curation. Here are our recommendations! If you have the time and interest, I'd highly recommend wandering around through these link lists to find ones that are best suited for your own learning style.
Lesen macht Spaß! According to the linguist Stephen Krashen, one of the most effective ways for you to gain proficiency and confidence in a language is through "comprehensible input" in a low-stress environment: Reading for pleasure is the #1 element on that list.