notebook
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notebook
A small book with blank pages used for writing down notes, thoughts, or appointments by hand.
Ich schreibe mir alle wichtigen Ideen sofort in mein Notizbuch.
I write all important ideas in my notebook right away.
The word is a clear compound of 'Notiz' (note) and 'Buch' (book). So it is literally a book intended for notes.
Er zückte sein Notizbuch, um die Telefonnummer aufzuschreiben.
He pulled out his notebook to write down the phone number.
The preposition 'in' is used with the accusative or dative depending on the situation. 'Etwas ins Notizbuch schreiben' (to write something into the notebook) describes the action, while 'etwas steht im Notizbuch' (something is in the notebook) describes the location.
Schreib dir den Termin bitte in dein Notizbuch.
Please write the appointment in your notebook.
Common verbs used with 'Notizbuch' (notebook) are 'etwas aufschreiben' (to write something down), 'etwas notieren' (to note something), or 'etwas festhalten' (to record something). The preposition 'in' is often used with the accusative.
Ich habe mir deine Adresse in mein Notizbuch geschrieben.
I wrote your address in my notebook.
notebook / issue / handle
'Heft' and 'Notizbuch' are both small books with pages that you can write in. 'Heft' is especially typical for school, exercises, and fixed assignments. It can also be larger and simpler. A 'Notizbuch' is used more for your own notes, ideas, appointments, or thoughts. It sounds more personal and is often somewhat more permanent. Learners may confuse the words because you write in both. When it is about lessons or homework, 'Heft' usually fits; when you are collecting free-form notes, 'Notizbuch' fits better.
Auf Reisen schreibt Sofia neue Adressen in ihr Notizbuch.
While traveling, Sofia writes new addresses in her notebook.
Im Matheunterricht öffnet Tom sein Heft und rechnet die Aufgaben.
In math class, Tom opens his notebook and does the exercises.