# Save task and compute feedback for saved task

Compute feedback for our task in two steps:

1. Send task to the Taskbase platform.
2. Request feedback for a learner's answer to the task.


## Setup

You will need

- a valid API token
- a specific task
- some learners' answers


## Tutorial

### Step 1: Send task

Send task and obtain its relevant evaluation criteria.
The [`taskDefinition.id`](http://127.0.0.1:4000/apis/specification/aspects/computetaskaspects#aspects/computetaskaspects/t=request&path=taskdefinition&d=0/id)
is the identifier used in subsequent requests to target this task. The identifier is provided by your system and needs to be unique.

The response will include a list of aspects, which are the evaluation criteria used to assess a learner's answer.

For API reference see [Returns all relevant Aspects for a given task](/apis/specification/aspects).

**API Call Example:**

**API Call Response Example Excerpt:**


```json
[
  ...
  {
    "name": "Present 3rd person singular of regular verbs",
    "description": "The student can correctly form the present 3rd person singular of regular verbs.",
    "type": "CONCEPT",
    "aspectGroup": {
      "name": "Grammar",
      "description": "Grammatical concepts such as conjugation, tenses and conditionals"
    }
  },
  ...
]
```

### Step 2: Request feedback

You now have a task in the Taskbase platform. You can request feedback by providing the learner's answer
To target that task, use the same [`taskDefinition.id`](http://127.0.0.1:4000/apis/specification/aspects/computetaskaspects#aspects/computetaskaspects/t=request&path=taskdefinition&d=0/id)
as part of the URL.

For API reference see [Compute feedback for an existing task](/apis/specification/feedback/computefeedbackbytaskid).

**API Call Example:**

**API Call Response Example Excerpt:**


```json
{
  ...
  "result": {
    "sampleSolution": {
      "content": "The Battle of Waterloo was in 1815."
    },
    "feedback": [
      {
        "correctness": "correct",
        "aspects": [
          {
            "name": "Present 3rd person singular of regular verbs",
            "description": "A student can correctly form the present 3rd person singular of regular verbs.",
            "type": "CONCEPT",
            "aspectGroup": {
              "name": "Grammar",
              "description": "Grammatical concepts such as conjugation, tenses and conditionals"
            }
          }
        ],
        "message": "Indeed, the Battle of Waterloo was on Saturday, the 15th of June 1815",
        "context": [
          {
            "content": "was in 1815",
            "offset": 23,
            "length": 11
          }
        ]
      }
    ],
    "answer": {
      "content": "The Battle of Waterloo was in 1815."
    },
    ...
  }
}
```

## Outcome

You sent a task and then requested feedback on a learner's answer to it.